 Those delegates would normally vote for him, but the rules do not bind or force them to do so. Delegates of the convention can vote with their conscience, which means they can throw their vote to someone else. So if Biden says, hey, I'm releasing the delegates, OK, all 4000 plus of you, I'm releasing you and I'm going to release you and you get to step. I'm going to step aside. Then there could be a throwdown.